The Federal Aviation Administration has paused SpaceX's the launch of its Starship rocket as the U.S. agency oversees an investigation by the private company of the breakup after a test launch Thursday.

The US has grounded SpaceX's giant Starship rocket while an investigation is carried out into why one exploded during its latest test flight. The rocket's upper stage dramatically broke up and disintegrated over the Caribbean after launching from Texas on Thursday, forcing airline flights to alter course to avoid falling debris.

SpaceX is counting down to its seventh Starship test flight from South Texas. A 60-minute launch window opens at 4 p.m.